connect($host. ':80')->then(function (ConnectionInterface $connection) use ($host) { $connection->on('data', function ($data) { echo $data; }); $connection->on('close', function () { echo '[CLOSED]' . PHP_EOL; }); $connection->write("GET / HTTP/1.0\r\nHost: $host\r\n\r\n"); }, 'printf'); $loop->run();